What is it about?
We model the effect of alloying with Ti on the phase behaviour of the VNbMoTaW and NbMoTaW high-entropy alloys. In alignment with experimental results, we find that Ti introduces strong chemical correlations in these complex materials, leading to emergent phase segregation and eventual multiphase behaviour.
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Why is it important?
These results shed light on the underlying physical origins of experimentally observed spinodal decomposition in high-entropy alloy samples.
Perspectives
This work demonstrates that, when combined with density functional theory (DFT) calculations, the coherent potential approximation (CPA) offers a computationally cost-effective means by which to study the electronic structure and phase behaviour of high-entropy alloys. The agreement with experimental observations is reassuring, and evidences the accuracy of the approach.
Christopher Woodgate
University of Warwick
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This page is a summary of: Competition between phase ordering and phase segregation in the TixNbMoTaW and TixVNbMoTaW refractory high-entropy alloys, Journal of Applied Physics, April 2024, American Institute of Physics,
DOI: 10.1063/5.0200862.
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